APA (7th ed.) Zitazioa
Kolby, J. (2000). Vocabulary 4000 eBook: The 4000 essential for an educated vocabulary. Nova Press.
Chicago Style (17th ed.) Zitazioa
Kolby, Jeff. Vocabulary 4000 EBook: The 4000 Essential for an Educated Vocabulary. Los Angeles: Nova Press, 2000.
MLA (9th ed.) Zitazioa
Kolby, Jeff. Vocabulary 4000 EBook: The 4000 Essential for an Educated Vocabulary. Nova Press, 2000.
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