(MacFarlane), R. B. A. (1975). Picea mariana. University of Michigan Herbarium Catalog Collection.
Chicago Style (17th ed.) Citation(MacFarlane), Ruth B. Alford. Picea Mariana. University of Michigan Herbarium Catalog Collection, 1975.
MLA (9th ed.) Citation(MacFarlane), Ruth B. Alford. Picea Mariana. University of Michigan Herbarium Catalog Collection, 1975.
Warning: These citations may not always be 100% accurate.