APA

Pengelly A., . (2004). The constituints of medicinal plants. Oxon: CABI Publishing.

Chicago

Pengelly Andrew, . 2004. The constituints of medicinal plants. Oxon: CABI Publishing.

Harvard

Pengelly A., . (2004). The constituints of medicinal plants. Oxon: CABI Publishing.

MLA

Pengelly Andrew, . The constituints of medicinal plants. Oxon: CABI Publishing. 2004.