Cita APA (7th ed.)

Williams, T. (2004). 251 Scientists of the world. Rohan Book Co.

Cita Chicago (17th ed.)

Williams, Timothy. 251 Scientists of the World. Delhi, India: Rohan Book Co, 2004.

Cita MLA (9th ed.)

Williams, Timothy. 251 Scientists of the World. Rohan Book Co, 2004.