Horner, C. E., & Booth, E. S. (1953). Spring flowers of southeastern Washington and northeastern Oregon. Walla Walla College, Dept. of Biological Sciences.
Chicago-referens (17:e uppl.)Horner, Chester E., och Ernest S. Booth. Spring Flowers of Southeastern Washington and Northeastern Oregon. College Place, Wash.: Walla Walla College, Dept. of Biological Sciences, 1953.
MLA-referens (8:e uppl.)Horner, Chester E., och Ernest S. Booth. Spring Flowers of Southeastern Washington and Northeastern Oregon. Walla Walla College, Dept. of Biological Sciences, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.