Cita APA (7a ed.)

Karner, T. (2002). The volunteer effect of answering personality questionnaires. Psychologische Beiträge, 44(1), 42-49.

Cita Chicago Style (17a ed.)

Karner, Thomas. "The Volunteer Effect of Answering Personality Questionnaires." Psychologische Beiträge 44, no. 1 (2002): 42-49.

Cita MLA (8a ed.)

Karner, Thomas. "The Volunteer Effect of Answering Personality Questionnaires." Psychologische Beiträge, vol. 44, no. 1, 2002, pp. 42-49.