Cita APA (7th ed.)

Colwell, R. N. (1970). The inventory of natural resources by means of aerial and space photography. University of British Columbia.

Cita Chicago (17th ed.)

Colwell, Robert N. The Inventory of Natural Resources by Means of Aerial and Space Photography. Vancouver, Canada: University of British Columbia, 1970.

Cita MLA (8th ed.)

Colwell, Robert N. The Inventory of Natural Resources by Means of Aerial and Space Photography. University of British Columbia, 1970.