Cita APA (7th ed.)

Hill, B., & Popp, A. (1960). Botany: A textbook for colleges (4th.). McGraw Hill books.

Cita Chicago (17th ed.)

Hill, B., i A. Popp. Botany: A Textbook for Colleges. 4th. London: McGraw Hill books, 1960.

Cita MLA (9th ed.)

Hill, B., i A. Popp. Botany: A Textbook for Colleges. 4th. McGraw Hill books, 1960.