APA (7th ed.) Citation

Balma Phillip & Filter William. (1986). Programmer's guide to GEM. SYBEX.

Chicago Style (17th ed.) Citation

Balma Phillip and Filter William. Programmer's Guide to GEM. SYBEX, 1986.

MLA (8th ed.) Citation

Balma Phillip and Filter William. Programmer's Guide to GEM. SYBEX, 1986.

Warning: These citations may not always be 100% accurate.