APA

Stearn W. T., . (1968). Humboldt, Bonpland, Kunth and tropical american botany : a miscellany on the 'Nova genera et species palntarum'. Lehre: J. Cramer.

Chicago

Stearn William T, . 1968. Humboldt, Bonpland, Kunth and tropical american botany : a miscellany on the 'Nova genera et species palntarum'. Lehre: J. Cramer.

Harvard

Stearn W. T., . (1968). Humboldt, Bonpland, Kunth and tropical american botany : a miscellany on the 'Nova genera et species palntarum'. Lehre: J. Cramer.

MLA

Stearn William T, . Humboldt, Bonpland, Kunth and tropical american botany : a miscellany on the 'Nova genera et species palntarum'. Lehre: J. Cramer. 1968.