Cita APA (7th ed.)

Brophy, P. (1976). COBOL programming. Clive Bingley & Linnet Books.

Cita Chicago (17th ed.)

Brophy, Peter. COBOL Programming. London: Clive Bingley & Linnet Books, 1976.

Cita MLA (9th ed.)

Brophy, Peter. COBOL Programming. Clive Bingley & Linnet Books, 1976.