Cita APA (7a ed.)

Roberts, S., & Heller, P. (1997). Java 1.1 certification study guide. Sybex.

Cita Chicago Style (17a ed.)

Roberts, Simon, y Philip Heller. Java 1.1 Certification Study Guide. San Francisco [etc.]: Sybex, 1997.

Cita MLA (9a ed.)

Roberts, Simon, y Philip Heller. Java 1.1 Certification Study Guide. Sybex, 1997.