Cita APA (7a ed.)

Yourdon, E. (1979). Learning to program in structured Cobol: Parts 1 and 2. Prentice-Hall.

Cita Chicago Style (17a ed.)

Yourdon, Edward. Learning to Program in Structured Cobol: Parts 1 and 2. Englewood Cliffs, New Jersey: Prentice-Hall, 1979.

Cita MLA (9a ed.)

Yourdon, Edward. Learning to Program in Structured Cobol: Parts 1 and 2. Prentice-Hall, 1979.