Παραπομπή APA

Harman, H. (1958). Commercial apprenticeship. Sir Isaac pitman & sons, limited.

Παραπομπή Chicago Style

Harman, Harold. Commercial Apprenticeship. London: Sir Isaac pitman & sons, limited, 1958.

Παραπομπή MLA

Harman, Harold. Commercial Apprenticeship. Sir Isaac pitman & sons, limited, 1958.