APA (7th ed.) Citation

Earl. (1970). How to choose and use tuners and amplifiers. Fountain Press.

Chicago Style (17th ed.) Citation

Earl. How to Choose and Use Tuners and Amplifiers. London: Fountain Press, 1970.

MLA (8th ed.) Citation

Earl. How to Choose and Use Tuners and Amplifiers. Fountain Press, 1970.

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