Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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