Cita APA

Calhoun, D. R. (1999). Britanica book of the year 1999. Encyclopaedia Britanica, Inc..

Chicago Edition Citation

Calhoun, David R. Britanica Book of the Year 1999. Chicago: Encyclopaedia Britanica, Inc., 1999.

Cita MLA

Calhoun, David R. Britanica Book of the Year 1999. Encyclopaedia Britanica, Inc., 1999.