Reference list entry
Kaufmann, W. J., III, & Comins, N. F. (2003). Discovering the universe (Version 6.0) [Computer software]. New York, NY: Freeman.
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Directory to APA reference list models
Exercise: APA documentation: identifying elements of sources
Exercise: APA documentation: reference list 1
Exercise: APA documentation: reference list 2
Exercise: APA documentation: reference list 3
Exercise: APA documentation