Παραπομπή APA

Roberts, H. (1965). Intermediate book - keeping exercises. Edaward Arnold.

Παραπομπή Chicago Style

Roberts, H.C. Intermediate Book - Keeping Exercises. London: Edaward Arnold, 1965.

Παραπομπή MLA

Roberts, H.C. Intermediate Book - Keeping Exercises. Edaward Arnold, 1965.