APA (7th ed.) Citation

(1993). The code book: Amateur radio CW operating / by Robert J. Halprin.

Chicago Style (17th ed.) Citation

The Code Book: Amateur Radio CW Operating / by Robert J. Halprin. 1993.

MLA (9th ed.) Citation

The Code Book: Amateur Radio CW Operating / by Robert J. Halprin. 1993.

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