APA (7th ed.) Citation

Howling, B., & Pepper, A. (1989). GEM: Programmierleitfaden für IBM PC. Hanser.

Chicago Style (17th ed.) Citation

Howling, Barry, and Andrew Pepper. GEM: Programmierleitfaden Für IBM PC. München [u.a.]: Hanser, 1989.

MLA (9th ed.) Citation

Howling, Barry, and Andrew Pepper. GEM: Programmierleitfaden Für IBM PC. Hanser, 1989.

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