APA

Litvin A., Belliston H., . (1978). Sound transmission loss through concrete and concrete masonry walls. Skokie, IL: Portland Cement Association. Research and development bulletin RD 066.

Chicago

Litvin A, Belliston HW, . 1978. Sound transmission loss through concrete and concrete masonry walls. Skokie, IL: Portland Cement Association. Research and development bulletin RD 066.

Harvard

Litvin A., Belliston H., . (1978). Sound transmission loss through concrete and concrete masonry walls. Skokie, IL: Portland Cement Association. Research and development bulletin RD 066.

MLA

Litvin A, Belliston HW, . Sound transmission loss through concrete and concrete masonry walls. Skokie, IL: Portland Cement Association. Research and development bulletin RD 066. 1978.