(1992). Hortica A Color Cyclopedia Of Garden Flora In All Climates And Indoor Plants/alfred Byrd Graf. Roehrs Company.
Chicago-viite (17. p.)Hortica A Color Cyclopedia Of Garden Flora In All Climates And Indoor Plants/alfred Byrd Graf. Roehrs Company, 1992.
MLA-viite (8. p.)Hortica A Color Cyclopedia Of Garden Flora In All Climates And Indoor Plants/alfred Byrd Graf. Roehrs Company, 1992.
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