APA (7th ed.) Citation

Holmgren, V. C. (1983). Scans key to birdwatching. Timber Press.

Chicago Style (17th ed.) Citation

Holmgren, Virginia C. Scans Key to Birdwatching. Portland, OR: Timber Press, 1983.

MLA (9th ed.) Citation

Holmgren, Virginia C. Scans Key to Birdwatching. Timber Press, 1983.