Single Author
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Single Author

Single Author:

Where the citation is integrated into the text, and the author’s name is part of the narrative, only the publication year appears in parentheses. An example is shown below.

Kosslyn (1980) proposed that the visual imagery experience 

involves a number of processing components.

Where the citation is placed at the end of the sentence, the author and publication year appear in parentheses. An example is shown below.

It has been argued that the visual imagery experience 

involves a number of processing components (Kosslyn, 1980).

Same Work in the One Paragraph:

Include the year of publication in the first citation in each paragraph. You do not have to include the year of publication in the second and subsequent citations within the paragraph, as long as it is clear that they come from the same work. An example is shown below.

In a recent study of health psychology, Pretty (2002) examined

the effect of self-esteem… Pretty also found …

Same Author and Same Year of Publication:

For citations by the same author with the same publication date:

Add lower-case letters of the alphabet (e.g., a, b, c) to the years of publication so that you can distinguish between them.

You add the lower-case letters to each work according to the alphabetical order of the titles (excluding "A" or "The").

For example, consider the following two articles by the same author:

Marks (1989) – "Bibliography of research utilising Vividness of Visual

Imagery Questionnaire."

Marks (1989) – "Construct validity of the Vividness of Visual Imagery

Questionnaire."

Here, the top reference would be assigned an "a" and the bottom reference would be assigned a "b". They would be cited as follows in text as follows:

Marks (1989a) defined imagery vividness as a combination 

of clarity and liveliness…. Marks (1989b) proposed that imagery vividness 

was related to performance of visual memory and perception tasks.

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