APA aipamena

RIES AL. (1990). BOTTOM UP MARKETING. PLUME BOOK.

Chicago Style aipamena

RIES AL. BOTTOM UP MARKETING. NEW YORK: PLUME BOOK, 1990.

MLA aipamena

RIES AL. BOTTOM UP MARKETING. PLUME BOOK, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.