APA (7th ed.) Citation

Campbell, D. H. (1926). An outline of plant geography. The Macmillan company.

Chicago Style (17th ed.) Citation

Campbell, Douglas Houghton. An Outline of Plant Geography. New York: The Macmillan company, 1926.

MLA (9th ed.) Citation

Campbell, Douglas Houghton. An Outline of Plant Geography. The Macmillan company, 1926.

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