Bales, S. F. (1991). Burpee Americam gardening series annuals. Prentice Hall Press.
Chicago Style (17th ed.) CitationBales, Suzanne Frutig. Burpee Americam Gardening Series Annuals. Prentice Hall Press, 1991.
Cita MLABales, Suzanne Frutig. Burpee Americam Gardening Series Annuals. Prentice Hall Press, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.