APA Style

WALKER, ?, R. (1970). MODERN METALWORKING MATERIALS, TOOLS AND PROCEDURES . united states of america: The Goodheart-willcox co.,inc.

MLA Style

WALKER, ?JONH, R.. "MODERN METALWORKING MATERIALS, TOOLS AND PROCEDURES". united states of america: The Goodheart-willcox co.,inc, 1970. .