Cita APA (7th ed.)
Frisch, R., & Nataf, A. (1966). Maxima and minima: Theorie and economic applications. Reidel.
Cita Chicago (17th ed.)
Frisch, Ragnar, i A. Nataf. Maxima and Minima: Theorie and Economic Applications. Dordrecht: Reidel, 1966.
Cita MLA (9th ed.)
Frisch, Ragnar, i A. Nataf. Maxima and Minima: Theorie and Economic Applications. Reidel, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.