APA aipamena

RYAN ERIC. (2011). METHOD METHOD. PENGUIN BOOKS.

Chicago Style aipamena

RYAN ERIC. METHOD METHOD. ENGLAND: PENGUIN BOOKS, 2011.

MLA aipamena

RYAN ERIC. METHOD METHOD. PENGUIN BOOKS, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.