Kleck, Robert E.; Nuessle, William. Congruence between the indicative and communicative functions of eye contact in interpersonal relations.. British Journal of Social and Clinical Psychology. December 1968, 7 (4): 241–246. PMID 5706460. doi:10.1111/j.2044-8260.1968.tb00565.x.
Kleck, Robert E.; Nuessle, William. Congruence between the indicative and communicative functions of eye contact in interpersonal relations.. British Journal of Social and Clinical Psychology. December 1968, 7 (4): 241–246. PMID 5706460. doi:10.1111/j.2044-8260.1968.tb00565.x.