Cita APA

Long, R. W., & Norstog, K. J. (1976). Plant biology: A laboratory manual for elementary botany. Philadelphia: Saunders.

Citación estilo Chicago

Long, Robert W., y Knut Jonson Norstog. Plant Biology: A Laboratory Manual for Elementary Botany. Philadelphia: Saunders, 1976.

Cita MLA

Long, Robert W., y Knut Jonson Norstog. Plant Biology: A Laboratory Manual for Elementary Botany. Philadelphia: Saunders, 1976.