APA-ийн эшлэл(7 дахь хэвлэлт)

Spear, R. J., & Spear, T. M. (1997). Introduction to computer programming in Visual Basic 6.0. Dryden Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Spear, Robert J., ба Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Fort Worth: Dryden Press, 1997.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Spear, Robert J., ба Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Dryden Press, 1997.