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.