Hargreaves, B., & Hargreaves, D. (1965). Tropical trees. Hargreaves Company.
芝加哥风格引文Hargreaves, Bob, 与 Dorothy Hargreaves. Tropical Trees. Hawaii: Hargreaves Company, 1965.
MLA引文Hargreaves, Bob, 与 Dorothy Hargreaves. Tropical Trees. Hargreaves Company, 1965.
警告：这些引文格式不一定是100％准确.