APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.