APA
Shelton N. &. B. S., . (1990). Using Lotus 1-2-3 : with exercises. Galgotia Publications pvt.Ltd, New Delhi: .
Chicago
Shelton Nelds & Burton Sharon, . 1990. Using Lotus 1-2-3 : with exercises. Galgotia Publications pvt.Ltd, New Delhi: .
Harvard
Shelton N. &. B. S., . (1990). Using Lotus 1-2-3 : with exercises. Galgotia Publications pvt.Ltd, New Delhi: .
MLA
Shelton Nelds & Burton Sharon, . Using Lotus 1-2-3 : with exercises. Galgotia Publications pvt.Ltd, New Delhi: . 1990.