APA

Porter K., Armstrong P., . (1979). Analysis of a questionnaire on Australian practice in trench backfilling and reinstatement. Vermont,Vict: Australian Road Research Board. Research Report no 56.

Chicago

Porter KF, Armstrong PJ, . 1979. Analysis of a questionnaire on Australian practice in trench backfilling and reinstatement. Vermont,Vict: Australian Road Research Board. Research Report no 56.

Harvard

Porter K., Armstrong P., . (1979). Analysis of a questionnaire on Australian practice in trench backfilling and reinstatement. Vermont,Vict: Australian Road Research Board. Research Report no 56.

MLA

Porter KF, Armstrong PJ, . Analysis of a questionnaire on Australian practice in trench backfilling and reinstatement. Vermont,Vict: Australian Road Research Board. Research Report no 56. 1979.