Wright, R. L. (1924). The practical book of outdoor flowers. Lippincott.
Lua i Stíl Chicago (17ú heag.)Wright, Richardson Little. The Practical Book of Outdoor Flowers. Philadelphia: Lippincott, 1924.
Lua MLA (8ú heag.)Wright, Richardson Little. The Practical Book of Outdoor Flowers. Lippincott, 1924.
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