Cita APA (7a ed.)

Johnson, S. E., & Richaenhaller, J. (1978). Patents relating to mechanization of timber harvesting (4th ed.). Canadian Forestry Service.

Cita Chicago Style (17a ed.)

Johnson, S. E., y J. Richaenhaller. Patents Relating to Mechanization of Timber Harvesting. 4th ed. Ottawa: Canadian Forestry Service, 1978.

Cita MLA (9a ed.)

Johnson, S. E., y J. Richaenhaller. Patents Relating to Mechanization of Timber Harvesting. 4th ed. Canadian Forestry Service, 1978.