APA (7th ed.) Citation

Penfold, R. A. (1977). Beginner's guide to building electronic projects / by R.A. Penfold. Bernards.

Chicago Style (17th ed.) Citation

Penfold, R. A. Beginner's Guide to Building Electronic Projects / by R.A. Penfold. London: Bernards, 1977.

MLA (9th ed.) Citation

Penfold, R. A. Beginner's Guide to Building Electronic Projects / by R.A. Penfold. Bernards, 1977.

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