Ippel, M. J. (1986). Component-testing: A theory of cognitive aptitude measurement. Free University Press.
Čikaški stil citiranja (17. izdanje)Ippel, Martinus Johannes. Component-testing: A Theory of Cognitive Aptitude Measurement. Amsterdam: Free University Press, 1986.
MLA način citiranja (8. izdanje)Ippel, Martinus Johannes. Component-testing: A Theory of Cognitive Aptitude Measurement. Free University Press, 1986.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.