Cita APA (7a ed.)

Spicer, R. A., & Thomas, B. A. (1986). Systematic and taxonomic approsches in palaeobotany. The Systematics Association.

Cita Chicago Style (17a ed.)

Spicer, R. A., y B. A. Thomas. Systematic and Taxonomic Approsches in Palaeobotany. London: The Systematics Association, 1986.

Cita MLA (8a ed.)

Spicer, R. A., y B. A. Thomas. Systematic and Taxonomic Approsches in Palaeobotany. The Systematics Association, 1986.