Cita APA (7th ed.)
Hubbard, L. R. (2012). Horticulture: For a greener world. Bridge Publications.
Cita Chicago (17th ed.)
Hubbard, L. Ron. Horticulture: For a Greener World. Commerce, California: Bridge Publications, 2012.
Cita MLA (9th ed.)
Hubbard, L. Ron. Horticulture: For a Greener World. Bridge Publications, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.