Citazione APA

Fry, R., & Hume, G. B. (1967). Manual of Commercial Correspondence. Issac Pitman.

Stile di citazione Chicago

Fry, Roland, e G Bayley Hume. Manual of Commercial Correspondence. London: Issac Pitman, 1967.

Citazione MLA

Fry, Roland, e G Bayley Hume. Manual of Commercial Correspondence. Issac Pitman, 1967.