APA

Parker S., Shackell R. i. & Smith T. i. (1992). Charles Darwin. [Porto]: Edinter.

Chicago

Parker Steve, Shackell Rodney il and Smith Tony il. 1992. Charles Darwin. [Porto]: Edinter.

Harvard

Parker S., Shackell R. i. and Smith T. i. (1992). Charles Darwin. [Porto]: Edinter.

MLA

Parker Steve, Shackell Rodney il and Smith Tony il. Charles Darwin. [Porto]: Edinter. 1992.