APA

Harper W. . M., Lim H. . C., . (1982). operational Research. London: Macdonald & Evans.

Chicago

Harper W M, Lim H C, . 1982. operational Research. London: Macdonald & Evans.

Harvard

Harper W. . M., Lim H. . C., . (1982). operational Research. London: Macdonald & Evans.

MLA

Harper W M, Lim H C, . operational Research. London: Macdonald & Evans. 1982.