Lua APA (7ú heag.)

McMahoney, B., & Roughley, E. (1968). Essex survey analysis users' manual. Computing Centre, Univ. of Essex.

Lua i Stíl Chicago (17ú heag.)

McMahoney, Brian, agus Eric Roughley. Essex Survey Analysis Users' Manual. Essex: Computing Centre, Univ. of Essex, 1968.

Lua MLA (8ú heag.)

McMahoney, Brian, agus Eric Roughley. Essex Survey Analysis Users' Manual. Computing Centre, Univ. of Essex, 1968.

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