Παραπομπή APA

Runquist , O., Creswell ,Clifford J, & Head , J. .. (1970). Chemical principles: A programmed text. Vakils, feffer and simons Ltd..

Παραπομπή Chicago Style

Runquist , Olaf, Creswell ,Clifford J, και J .Thomas Head. Chemical Principles: A Programmed Text. India: Vakils, feffer and simons Ltd., 1970.

Παραπομπή MLA

Runquist , Olaf, et al. Chemical Principles: A Programmed Text. Vakils, feffer and simons Ltd., 1970.