APA
PUNJAB(govt. of---), PUNJAB(govt. of---), . (1957). Economics of tracter cultivation in punjab for the year 1957-57. punjab: Economic and stat organigation.
Chicago
PUNJAB(govt. of---), PUNJAB(govt. of---), . 1957. Economics of tracter cultivation in punjab for the year 1957-57. punjab: Economic and stat organigation.
Harvard
PUNJAB(govt. of---), PUNJAB(govt. of---), . (1957). Economics of tracter cultivation in punjab for the year 1957-57. punjab: Economic and stat organigation.
MLA
PUNJAB(govt. of---), PUNJAB(govt. of---), . Economics of tracter cultivation in punjab for the year 1957-57. punjab: Economic and stat organigation. 1957.