Cita APA

Krohn, R., & Krohn, R. (1971). English sentence structure: An intensive course of English ([1. edición].). Ann Arbor: University of Michigan Press.

Citación estilo Chicago

Krohn, Robert, y Robert Krohn. English Sentence Structure: An Intensive Course of English. [1. edición]. Ann Arbor: University of Michigan Press, 1971.

Cita MLA

Krohn, Robert, y Robert Krohn. English Sentence Structure: An Intensive Course of English. [1. edición]. Ann Arbor: University of Michigan Press, 1971.