APA Citation

O'HARA, A. (1999). A practical guide to gas contracting. Penn Well.

Chicago Style Citation

O'HARA, Ann. A Practical Guide to Gas Contracting. Penn Well, 1999.

MLA Citation

O'HARA, Ann. A Practical Guide to Gas Contracting. Penn Well, 1999.

Warning: These citations may not always be 100% accurate.