Cita APA

HARPER, W., & HARPER, W. (1976). Statistics W.m. Harper. Macdonald and Evans.

Chicago Style (17th ed.) Citation

HARPER, W.M, i W.M HARPER. Statistics W.m. Harper. Macdonald and Evans, 1976.

Cita MLA

HARPER, W.M, i W.M HARPER. Statistics W.m. Harper. Macdonald and Evans, 1976.