Cita APA (7a ed.)

Allen, S. W. (1938). An introduction to american forestry (1 ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Allen, Shirley Walter. An Introduction to American Forestry. 1 ed. New York: McGraw-Hill, 1938.

Cita MLA (8a ed.)

Allen, Shirley Walter. An Introduction to American Forestry. 1 ed. McGraw-Hill, 1938.