Dyfyniad APA

Williamson, E. M., Okpako, D. T., & Evans, F. J. (1996). Pharmacological methods in phytotherapy research. Wiley.

Dyfyniad Arddull Chicago

Williamson, Elizabeth M., D. T. Okpako, and Fred J. Evans. Pharmacological Methods in Phytotherapy Research. Chichester, [England]: Wiley, 1996.

Dyfyniad MLA

Williamson, Elizabeth M., et al. Pharmacological Methods in Phytotherapy Research. Wiley, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.