Cita APA

Helmer, M. J. C., Wilson, H. V. P. 1., Vavak, D., Pikes, J., Kaiser, B., & Kalina, W. (1978). African violets and other gesneriads for modern living. Kalamazoo, Michigan: Merchants Publishing Company.

Citación estilo Chicago

Helmer, M. Jane Coleman, Helen Van Pelt 1901-2003 Wilson, Dean Vavak, John Pikes, Bill Kaiser, y Willarde Kalina. African Violets and Other Gesneriads for Modern Living. Kalamazoo, Michigan: Merchants Publishing Company, 1978.

Cita MLA

Helmer, M. Jane Coleman, et al. African Violets and Other Gesneriads for Modern Living. Kalamazoo, Michigan: Merchants Publishing Company, 1978.