Mastalerz, J. W., & Langhans, R. W. (1969). Roses: A manual on the culture, management, diseases, insects, economics and breeding of greenhouse roses. New York: Roses Incorporated New York State Flower Growers Assocoation, Inc. Pannsylvania Flower Growers.
Citación estilo ChicagoMastalerz, John W., and Robert W. Langhans. Roses: A Manual On the Culture, Management, Diseases, Insects, Economics and Breeding of Greenhouse Roses. New York: Roses Incorporated New York State Flower Growers Assocoation, Inc. Pannsylvania Flower Growers, 1969.
Cita MLAMastalerz, John W., and Robert W. Langhans. Roses: A Manual On the Culture, Management, Diseases, Insects, Economics and Breeding of Greenhouse Roses. New York: Roses Incorporated New York State Flower Growers Assocoation, Inc. Pannsylvania Flower Growers, 1969.