APA

Martínez A. R., McMichael C. L., World Petroleum Congress (15th. : 1997 : Beijing) & McMichael C. L.Classification of petroleum reserves. : .

Chicago

Martínez Aníbal R, McMichael Claude L, World Petroleum Congress (15th. : 1997 : Beijing) and McMichael Claude L.Classification of petroleum reserves. : .

Harvard

Martínez A. R., McMichael C. L., World Petroleum Congress (15th. : 1997 : Beijing) and McMichael C. L.Classification of petroleum reserves. : .

MLA

Martínez Aníbal R, McMichael Claude L, World Petroleum Congress (15th. : 1997 : Beijing) and McMichael Claude L.: . .