APA (7th ed.) Zitazioa

ESSER, M. (1968). Differential equations. W.B. Saunders.

Chicago Style (17th ed.) Zitazioa

ESSER, Martinus. Differential Equations. London: W.B. Saunders, 1968.

MLA (9th ed.) Zitazioa

ESSER, Martinus. Differential Equations. W.B. Saunders, 1968.