APA

Buttry K. E., McCullough E. S. & Wetzel R. A. (1993). Laboratory evaluation of connection strength of geogrid to segmental concrete units. : Transportation Research Record.

Chicago

Buttry Kenneth E, McCullough Earl S and Wetzel Richard A. 1993. Laboratory evaluation of connection strength of geogrid to segmental concrete units. : Transportation Research Record.

Harvard

Buttry K. E., McCullough E. S. and Wetzel R. A. (1993). Laboratory evaluation of connection strength of geogrid to segmental concrete units. : Transportation Research Record.

MLA

Buttry Kenneth E, McCullough Earl S and Wetzel Richard A. Laboratory evaluation of connection strength of geogrid to segmental concrete units. : Transportation Research Record. 1993.