Παραπομπή APA

Roff, H., & Watson, T. (1961). Job analysis. Institute of personnel management.

Παραπομπή Chicago Style

Roff, H.E, και T.E Watson. Job Analysis. London: Institute of personnel management, 1961.

Παραπομπή MLA

Roff, H.E, και T.E Watson. Job Analysis. Institute of personnel management, 1961.