APA (7th ed.) Citation

Nearing, G. G. (1947). The lichen book: Handbook of the lichens of northeastern United States. [publisher not identified].

Chicago Style (17th ed.) Citation

Nearing, G. G. The Lichen Book: Handbook of the Lichens of Northeastern United States. Ridgewood, N.J.: [publisher not identified], 1947.

MLA (9th ed.) Citation

Nearing, G. G. The Lichen Book: Handbook of the Lichens of Northeastern United States. [publisher not identified], 1947.