TreePeople (Firm), Lipkis, A., & Lipkis, K. (1990). The simple act of planting a tree: A citizen forester's guide to healing your neighborhood, your city, and your world. J.P. Tarcher.
Chicago Style (17th ed.) CitationTreePeople (Firm), Andy Lipkis, and Katie Lipkis. The Simple Act of Planting a Tree: A Citizen Forester's Guide to Healing Your Neighborhood, Your City, and Your World. Los Angeles: J.P. Tarcher, 1990.
MLA (9th ed.) CitationTreePeople (Firm), et al. The Simple Act of Planting a Tree: A Citizen Forester's Guide to Healing Your Neighborhood, Your City, and Your World. J.P. Tarcher, 1990.
Warning: These citations may not always be 100% accurate.