PIGNANI, T. J. Elements of trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.
Cita Chicago Style (17a ed.)PIGNANI, Tullio J. Elements of Trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.
Cita MLA (8a ed.)PIGNANI, Tullio J. Elements of Trigonometry#Tullio J.Pignani; Paul W.Haggard. Harcourt, Brace ^ World.
Precaución: Estas citas no son 100% exactas.