Russell, P. J. (1959). Sea signalling simplified: A simple system for learning and using the International Code of Signals, morse lamp and semaphore (2nd ed.). Coles.
Chicago Style (17th ed.) CitationRussell, Percy John. Sea Signalling Simplified: A Simple System for Learning and Using the International Code of Signals, Morse Lamp and Semaphore. 2nd ed. Harrap ; De Graff: Coles, 1959.
MLA (9th ed.) CitationRussell, Percy John. Sea Signalling Simplified: A Simple System for Learning and Using the International Code of Signals, Morse Lamp and Semaphore. 2nd ed. Coles, 1959.
Warning: These citations may not always be 100% accurate.