WENTS FRITS W. (1980). PLANTS. TIME LIFE BOOKS.
Lua i Stíl Chicago (17ú heag.)WENTS FRITS W. PLANTS. HONGKONG: TIME LIFE BOOKS, 1980.
Lua MLA (9ú heag.)WENTS FRITS W. PLANTS. TIME LIFE BOOKS, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.