APA (7th ed.) Citation

Allkin, R. (2017). Useful plants, medicines: At least 28,187 plant species are currently recorded as being of medicinal use. Royal Botanic Gardens, Kew.

Chicago Style (17th ed.) Citation

Allkin, R. Useful Plants, Medicines: At Least 28,187 Plant Species Are Currently Recorded as Being of Medicinal Use. London: Royal Botanic Gardens, Kew, 2017.

MLA (9th ed.) Citation

Allkin, R. Useful Plants, Medicines: At Least 28,187 Plant Species Are Currently Recorded as Being of Medicinal Use. Royal Botanic Gardens, Kew, 2017.