Παραπομπή APA

Roberts, H. (1965). Elementary book - keeping exercises/2e (2nd ed.). Edward Arnold limited.

Παραπομπή Chicago Style

Roberts, H.C. Elementary Book - Keeping Exercises/2e. 2nd ed. London: Edward Arnold limited, 1965.

Παραπομπή MLA

Roberts, H.C. Elementary Book - Keeping Exercises/2e. 2nd ed. Edward Arnold limited, 1965.