APA (7th ed.) Citation

Penfold, R. A. (1980). Popular electronic circuits / by R.A. Penfold. Babani.

Chicago Style (17th ed.) Citation

Penfold, R. A. Popular Electronic Circuits / by R.A. Penfold. London: Babani, 1980.

MLA (9th ed.) Citation

Penfold, R. A. Popular Electronic Circuits / by R.A. Penfold. Babani, 1980.

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