Graf, A. B. (1992). Hortica: A color cyclopedia of garden flora in all climates and indoor plants. Roehrs Co., ; Macmillan.
Chicago Style (17th ed.) CitationGraf, Alfred Byrd. Hortica: A Color Cyclopedia of Garden Flora in All Climates and Indoor Plants. East Rutherford, N.J. : [New York, N.Y.]: Roehrs Co., ; Macmillan, 1992.
MLA (9th ed.) CitationGraf, Alfred Byrd. Hortica: A Color Cyclopedia of Garden Flora in All Climates and Indoor Plants. Roehrs Co., ; Macmillan, 1992.
Warning: These citations may not always be 100% accurate.