APA (7e ed.) Bronvermelding

Johnson, H. (1979). The principles of gardening: The classic guide to the gardeners art. Simon and Schuster.

Chicago (17e ed.) Bronvermelding

Johnson, Hugh. The Principles of Gardening: The Classic Guide to the Gardeners Art. New York: Simon and Schuster, 1979.

MLA (9e ed.) Bronvermelding

Johnson, Hugh. The Principles of Gardening: The Classic Guide to the Gardeners Art. Simon and Schuster, 1979.