एपीए उद्धरण

Johnson, G. B., & George B. Johnson. Essentials of the living world. Dubuque, IA: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Johnson, George B., और George B. Johnson. Essentials of the Living World. Dubuque, IA: McGraw-Hill.

एमएलए उद्धरण

Johnson, George B., और George B. Johnson. Essentials of the Living World. Dubuque, IA: McGraw-Hill.