APA

Abbs B., Freebairn I., . (1999). Blueprint. Intermediate. Edinburgh: Longman.

Chicago

Abbs B, Freebairn I, . 1999. Blueprint. Intermediate. Edinburgh: Longman.

Harvard

Abbs B., Freebairn I., . (1999). Blueprint. Intermediate. Edinburgh: Longman.

MLA

Abbs B, Freebairn I, . Blueprint. Intermediate. Edinburgh: Longman. 1999.