Cita APA (7th ed.)

Nagaoka, H., & Theophilus, D. (1927). English and commercial correspondence: A course of training in the writing of English. Isaac Pitman.

Cita Chicago (17th ed.)

Nagaoka, Hiromu, i Daniel Theophilus. English and Commercial Correspondence: A Course of Training in the Writing of English. London: Isaac Pitman, 1927.

Cita MLA (8th ed.)

Nagaoka, Hiromu, i Daniel Theophilus. English and Commercial Correspondence: A Course of Training in the Writing of English. Isaac Pitman, 1927.