APA

Newbrook J., Wilson J., . (2001). Gold. Proficiency. Harlow: Longman.

Chicago

Newbrook J, Wilson J, . 2001. Gold. Proficiency. Harlow: Longman.

Harvard

Newbrook J., Wilson J., . (2001). Gold. Proficiency. Harlow: Longman.

MLA

Newbrook J, Wilson J, . Gold. Proficiency. Harlow: Longman. 2001.