Williams, B. S., & Williams, H. (1961). The orchid grower's manual: Containing descriptions of the best species and varieties of orchidaceous plants in cultivation (7th ed. rev. & enl.). Hafner.
Chicago Style (17th ed.) CitationWilliams, Benjamin Samuel, and Henry Williams. The Orchid Grower's Manual: Containing Descriptions of the Best Species and Varieties of Orchidaceous Plants in Cultivation. 7th ed. rev. & enl. Codicote, Herts. ; Wheldon & Wesley ; New York: Hafner, 1961.
MLA (9th ed.) CitationWilliams, Benjamin Samuel, and Henry Williams. The Orchid Grower's Manual: Containing Descriptions of the Best Species and Varieties of Orchidaceous Plants in Cultivation. 7th ed. rev. & enl. Hafner, 1961.
Warning: These citations may not always be 100% accurate.