APA

Tatu G. G., Oil and Gas Research Institute, World Petroleum Congress (11th. : 1983 : London) & Oil and Gas Research Institute.Deep drilling technology. : .

Chicago

Tatu Grigore Gr, Oil and Gas Research Institute, World Petroleum Congress (11th. : 1983 : London) and Oil and Gas Research Institute.Deep drilling technology. : .

Harvard

Tatu G. G., Oil and Gas Research Institute, World Petroleum Congress (11th. : 1983 : London) and Oil and Gas Research Institute.Deep drilling technology. : .

MLA

Tatu Grigore Gr, Oil and Gas Research Institute, World Petroleum Congress (11th. : 1983 : London) and Oil and Gas Research Institute.: . .