APA

Zolotov A., Orel V., Barkan E., Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Orel V., Barkan E. & Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry.Prognosis of oil and gas prospects at great depths. : .

Chicago

Zolotov A.N, Orel V.E, Barkan E.S, Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Orel V.E, Barkan E.S and Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry.Prognosis of oil and gas prospects at great depths. : .

Harvard

Zolotov A., Orel V., Barkan E., Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Orel V., Barkan E. and Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry.Prognosis of oil and gas prospects at great depths. : .

MLA

Zolotov A.N, Orel V.E, Barkan E.S, Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Orel V.E, Barkan E.S and Unión de Repúblicas Socialistas Soviéticas. Ministry of Oil Industry.: . .