APA (7th ed.) Citation

University of Michigan. English Language Institute & Krohn, R. (1971). An intensive course in English. University of Michigan Press.

Chicago Style (17th ed.) Citation

University of Michigan. English Language Institute and Robert Krohn. An Intensive Course in English. Ann Arbor: University of Michigan Press, 1971.

MLA (9th ed.) Citation

University of Michigan. English Language Institute and Robert Krohn. An Intensive Course in English. University of Michigan Press, 1971.