APA (7th ed.) Citation

St. John, H. (1956). Flora of southeastern Washington and of adjacent Idaho (Rev. ed.). Students Book Corporation.

Chicago Style (17th ed.) Citation

St. John, Harold. Flora of Southeastern Washington and of Adjacent Idaho. Rev. ed. Pullman, Wash.: Students Book Corporation, 1956.

MLA (9th ed.) Citation

St. John, Harold. Flora of Southeastern Washington and of Adjacent Idaho. Rev. ed. Students Book Corporation, 1956.