“April: Flowers.” California Native Gardening: A Month-by-Month Guide, by HELEN POPPER, 1st ed., University of California Press, Berkeley; Los Angeles; London, 2012, pp. 97–109, www.jstor.org/stable/10.1525/j.ctt1pp46t.10. Accessed 17 Apr. 2021.
POPPER, H. (2012). April: Flowers. In California Native Gardening: A Month-by-Month Guide (pp. 97-109). Berkeley; Los Angeles; London: University of California Press. Retrieved April 17, 2021, from http://www.jstor.org/stable/10.1525/j.ctt1pp46t.10
POPPER, HELEN. "April: Flowers." In California Native Gardening: A Month-by-Month Guide, 97-109. Berkeley; Los Angeles; London: University of California Press, 2012. Accessed April 17, 2021. http://www.jstor.org/stable/10.1525/j.ctt1pp46t.10.
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