Παραπομπή APA

Holgate, H. (1961). Exchange Arithmetic/5e (5th ed.). Sir Isaac pitman and sons limited.

Παραπομπή Chicago Style

Holgate, H.C.F. Exchange Arithmetic/5e. 5th ed. London: Sir Isaac pitman and sons limited, 1961.

Παραπομπή MLA

Holgate, H.C.F. Exchange Arithmetic/5e. 5th ed. Sir Isaac pitman and sons limited, 1961.