Cita APA (7th ed.)
Petersen, G. M. (1961). Calculus differential and integral (1a.ed.). Littlefield, Adams and Co..
Cita Chicago (17th ed.)
Petersen, G. M. Calculus Differential and Integral. 1a.ed. New Jersey: Littlefield, Adams and Co., 1961.
Cita MLA (9th ed.)
Petersen, G. M. Calculus Differential and Integral. 1a.ed. Littlefield, Adams and Co., 1961.
Atenció: Aquestes cites poden no estar 100% correctes.