APA

Spenik (Mark) And Others, . (1999). Visual Basic 6 Interactive Course. : .

Chicago

Spenik (Mark) And Others, . 1999. Visual Basic 6 Interactive Course. : .

Harvard

Spenik (Mark) And Others, . (1999). Visual Basic 6 Interactive Course. : .

MLA

Spenik (Mark) And Others, . Visual Basic 6 Interactive Course. : . 1999.