Cita APA (7a ed.)

Knocke, H. (1903). English commercial correspondence. Carl Meyer (Gustav Prior).

Cita Chicago Style (17a ed.)

Knocke, Hermann. English Commercial Correspondence. Hannover [etc.]: Carl Meyer (Gustav Prior), 1903.

Cita MLA (9a ed.)

Knocke, Hermann. English Commercial Correspondence. Carl Meyer (Gustav Prior), 1903.