APA

The International Union for Conservation of Nature, World Health Organization & World Wide Fund Nature. (1993). Guidelines on the conservation of medicinal plants. Gland, Switzerland: The International Union for Conservation of Nature and Natural Resources (IUNC), The World Health Organization (WHO), World Wide fund for Nature (WWF).

Chicago

The International Union for Conservation of Nature, World Health Organization and World Wide Fund Nature. 1993. Guidelines on the conservation of medicinal plants. Gland, Switzerland: The International Union for Conservation of Nature and Natural Resources (IUNC), The World Health Organization (WHO), World Wide fund for Nature (WWF).

Harvard

The International Union for Conservation of Nature, World Health Organization and World Wide Fund Nature. (1993). Guidelines on the conservation of medicinal plants. Gland, Switzerland: The International Union for Conservation of Nature and Natural Resources (IUNC), The World Health Organization (WHO), World Wide fund for Nature (WWF).

MLA

The International Union for Conservation of Nature, World Health Organization and World Wide Fund Nature. Guidelines on the conservation of medicinal plants. Gland, Switzerland: The International Union for Conservation of Nature and Natural Resources (IUNC), The World Health Organization (WHO), World Wide fund for Nature (WWF). 1993.