APA

Norman D. A., Shin D., American Petroleum Institute A., Norman D. A. & Shin D. (1991). Price adjustment in gasoline and heating oil markets. Washington: American Petroleum Institute, API.

Chicago

Norman Donald A, Shin David, American Petroleum Institute API, Norman Donald A and Shin David. 1991. Price adjustment in gasoline and heating oil markets. Washington: American Petroleum Institute, API.

Harvard

Norman D. A., Shin D., American Petroleum Institute A., Norman D. A. and Shin D. (1991). Price adjustment in gasoline and heating oil markets. Washington: American Petroleum Institute, API.

MLA

Norman Donald A, Shin David, American Petroleum Institute API, Norman Donald A and Shin David. Price adjustment in gasoline and heating oil markets. Washington: American Petroleum Institute, API. 1991.