APA (7. basım) Alıntı

Welford, R. (1988). The economics manuel skills at and AS level (3rd ed.). framework.

Chicago Style (17. basım) Atıf

Welford, Richard. The Economics Manuel Skills at and AS Level. 3rd ed. Lancaster: framework, 1988.

MLA (9th ed.) Atıf

Welford, Richard. The Economics Manuel Skills at and AS Level. 3rd ed. framework, 1988.