The radio amateur's license manual : how to get your amateur radio licenses, a study guide for the amateur examinations, F.C.C. regulations conveniently indexed, renewing, modifying, portable work, etc
MLA
The Radio Amateur's License Manual: How to Get Your Amateur Radio Licenses, a Study Guide for the Amateur Examinations, F.c.c. Regulations Conveniently Indexed, Renewing, Modifying, Portable Work, Etc.. Publication / American Radio Relay League. 15th ed. West Hartford, Conn.: American Radio Relay League, 1941
APA, 7th edition
(1941). The radio amateur's license manual: how to get your amateur radio licenses, a study guide for the amateur examinations, F.C.C. regulations conveniently indexed, renewing, modifying, portable work, etc.. Publication / American Radio Relay League. 15th ed. West Hartford, Conn.: American Radio Relay League
Chicago, 17th edition
The radio amateur's license manual: how to get your amateur radio licenses, a study guide for the amateur examinations, F.C.C. regulations conveniently indexed, renewing, modifying, portable work, etc.. Publication / American Radio Relay League. 15th ed. West Hartford, Conn.: American Radio Relay League, 1941