Gaya APA

McCracken, D, D., Garbassi, U. (1982). A guide to cobol programming (2nd.ed.). New York: John Wiley & Sons, Inc..

Gaya MLA

McCracken, Daniel, D., Garbassi, Umberto. "A guide to cobol programming". 2nd.ed. New York: John Wiley & Sons, Inc., 1982. Text.