Gaya APA

Robbers, J, E., Tyler, V, E. (). Tyler's Herbs of Choice: The Therapeutic use of Phytomedicinals . New York: The Haworth Herbal.

Gaya MLA

Robbers, James, E., Tyler, Varro, E. "Tyler's Herbs of Choice: The Therapeutic use of Phytomedicinals". New York: The Haworth Herbal, . Text.