APA (7th ed.) Citation

Howard, R. A. (1976). Cumulative index to National horticultural magazine, volumes 1-38, 1922-1959 & American horticultural magazine, volumes 39-50, 1960-1971. American Horticultural Society, Inc..

Chicago Style (17th ed.) Citation

Howard, Richard A. Cumulative Index to National Horticultural Magazine, Volumes 1-38, 1922-1959 & American Horticultural Magazine, Volumes 39-50, 1960-1971. Mount Vernon, Va.: American Horticultural Society, Inc., 1976.

MLA (9th ed.) Citation

Howard, Richard A. Cumulative Index to National Horticultural Magazine, Volumes 1-38, 1922-1959 & American Horticultural Magazine, Volumes 39-50, 1960-1971. American Horticultural Society, Inc., 1976.