Cita APA (7th ed.)

Chang, Y., & Sullivan, R. S. (1989). QSB +: Quantitative systems for business plus. Prentice-Hall.

Cita Chicago (17th ed.)

Chang, Yih-Long, i Robert S. Sullivan. QSB +: Quantitative Systems for Business Plus. Englewood Cliffs: Prentice-Hall, 1989.

Cita MLA (9th ed.)

Chang, Yih-Long, i Robert S. Sullivan. QSB +: Quantitative Systems for Business Plus. Prentice-Hall, 1989.