Cita APA (7a ed.)

Isaac, L. A. (1949). Better douglas fir forests from better seed. University of Washington press.

Cita Chicago Style (17a ed.)

Isaac, Leo A. Better Douglas Fir Forests from Better Seed. Seattle: University of Washington press, 1949.

Cita MLA (8a ed.)

Isaac, Leo A. Better Douglas Fir Forests from Better Seed. University of Washington press, 1949.