Cita APA (7th ed.)

Westwater, E. (1960). Simplified Calculus (1st.). English Universities Press Ltd.

Cita Chicago (17th ed.)

Westwater, E. Simplified Calculus. 1st. London: English Universities Press Ltd, 1960.

Cita MLA (9th ed.)

Westwater, E. Simplified Calculus. 1st. English Universities Press Ltd, 1960.