APA aipamena

Ballard, P. B. (1934). Group tests of intelligence (Primera edición.). University of London Press.

Chicago Style aipamena

Ballard, Philip Boswood. Group Tests of Intelligence. Primera edición. London: University of London Press, 1934.

MLA aipamena

Ballard, Philip Boswood. Group Tests of Intelligence. Primera edición. University of London Press, 1934.