APA (7th ed.) Citation

Heller, P., & Roberts, S. (1999). Java 1.2 developer's handbook. Sybex.

Chicago Style (17th ed.) Citation

Heller, Philip, and Simon Roberts. Java 1.2 Developer's Handbook. San Francisco [etc.]: Sybex, 1999.

MLA (9th ed.) Citation

Heller, Philip, and Simon Roberts. Java 1.2 Developer's Handbook. Sybex, 1999.