APA-referens (7:e uppl.)

Northup, C. S. (1970). A bibliography of Thomas Gray. Russell & Russell.

Chicago-referens (17:e uppl.)

Northup, Clark Sutherland. A Bibliography of Thomas Gray. New York: Russell & Russell, 1970.

MLA-referens (9:e uppl.)

Northup, Clark Sutherland. A Bibliography of Thomas Gray. Russell & Russell, 1970.