Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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