Cita APA (7th ed.)

Breckner, D., & Abel, P. (1970). Principles of business computer programming. Prentice-Hall.

Cita Chicago (17th ed.)

Breckner, David, i Peter Abel. Principles of Business Computer Programming. Englewood Cliffs, N.J: Prentice-Hall, 1970.

Cita MLA (9th ed.)

Breckner, David, i Peter Abel. Principles of Business Computer Programming. Prentice-Hall, 1970.