Briggs, D. J., & Courtney, F. M. (1985). Agriculture and environment: The physical geography of temperate agricultural systems. Longman.
Cytowanie według stylu Chicago (wyd. 17)Briggs, David J., i Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. London ; New York: Longman, 1985.
Cytowanie według stylu MLA (wyd. 9)Briggs, David J., i Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. Longman, 1985.