Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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