American Petroleum Institute. Division of Finance and Accounting. (1967). Report on certain petroleum industry accounting practices: Resurvey as of December 31, 1966. American Petroleum Institute,.
Dyfyniad Arddull ChicagoAmerican Petroleum Institute. Division of Finance and Accounting. Report on Certain Petroleum Industry Accounting Practices: Resurvey as of December 31, 1966. N.Y.: American Petroleum Institute,, 1967.
Dyfyniad MLAAmerican Petroleum Institute. Division of Finance and Accounting. Report on Certain Petroleum Industry Accounting Practices: Resurvey as of December 31, 1966. American Petroleum Institute,, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.