Cita APA (7th ed.)

Bluestone, M. D., & Mautner, R. (1974). How to program computers in COBOL. Collier Books, a Division of Macmillan Publishing Co., Inc.

Cita Chicago (17th ed.)

Bluestone, Morton D., i Richard Mautner. How to Program Computers in COBOL. New York: Collier Books, a Division of Macmillan Publishing Co., Inc, 1974.

Cita MLA (9th ed.)

Bluestone, Morton D., i Richard Mautner. How to Program Computers in COBOL. Collier Books, a Division of Macmillan Publishing Co., Inc, 1974.