APA aipamena

PIGNANI, T. J. Elements of trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.

Chicago Style aipamena

PIGNANI, Tullio J. Elements of Trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.

MLA aipamena

PIGNANI, Tullio J. Elements of Trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.