Dyfyniad APA

P.R.Srivastava & S.K.Shukla. (1997). Global environment series (1st.). Common Wealth.

Dyfyniad Arddull Chicago

P.R.Srivastava and S.K.Shukla. Global Environment Series. 1st. New Delhi: Common Wealth, 1997.

Dyfyniad MLA

P.R.Srivastava and S.K.Shukla. Global Environment Series. 1st. Common Wealth, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.