Παραπομπή APA

Mercer, G. L. (1965). Adding and calculating machines/3e (3rd ed.). Macdonald and Evans.

Παραπομπή Chicago Style

Mercer, G. Lawrence. Adding and Calculating Machines/3e. 3rd ed. London: Macdonald and Evans, 1965.

Παραπομπή MLA

Mercer, G. Lawrence. Adding and Calculating Machines/3e. 3rd ed. Macdonald and Evans, 1965.