APA

Berg W., Oppenlander J., . (1970). Accident analysis at railroad-highway grade crossings in urban areas. Lafayette: Purdue University. Engineering reprints CE nr 267. [Accident Analysis & Prevention. Vol 1. 1969, s 129-141].

Chicago

Berg WD, Oppenlander JC, . 1970. Accident analysis at railroad-highway grade crossings in urban areas. Lafayette: Purdue University. Engineering reprints CE nr 267. [Accident Analysis & Prevention. Vol 1. 1969, s 129-141].

Harvard

Berg W., Oppenlander J., . (1970). Accident analysis at railroad-highway grade crossings in urban areas. Lafayette: Purdue University. Engineering reprints CE nr 267. [Accident Analysis & Prevention. Vol 1. 1969, s 129-141].

MLA

Berg WD, Oppenlander JC, . Accident analysis at railroad-highway grade crossings in urban areas. Lafayette: Purdue University. Engineering reprints CE nr 267. [Accident Analysis & Prevention. Vol 1. 1969, s 129-141]. 1970.