Cita APA (7th ed.)

Friedman, F. L. (1982). Problem solving and structured programming in WATFIV. Addison-Wesley.

Cita Chicago (17th ed.)

Friedman, Frank L. Problem Solving and Structured Programming in WATFIV. Massachusettes: Addison-Wesley, 1982.

Cita MLA (9th ed.)

Friedman, Frank L. Problem Solving and Structured Programming in WATFIV. Addison-Wesley, 1982.