Cita APA (7a ed.)

Sturm, F. J. (1997). Trading natural gas: Cash futures options and swaps. Pennwell Books.

Cita Chicago Style (17a ed.)

Sturm, Fletcher J. Trading Natural Gas: Cash Futures Options and Swaps. Tulsa, Okla.: Pennwell Books, 1997.

Cita MLA (9a ed.)

Sturm, Fletcher J. Trading Natural Gas: Cash Futures Options and Swaps. Pennwell Books, 1997.