APA-referens (7:e uppl.)

PATNAIK, R. (2009). INTRODUCTION TO DIFFERENTIAL EQUATIONS. PHI.

Chicago-referens (17:e uppl.)

PATNAIK, R.K. INTRODUCTION TO DIFFERENTIAL EQUATIONS. N DELHI: PHI, 2009.

MLA-referens (9:e uppl.)

PATNAIK, R.K. INTRODUCTION TO DIFFERENTIAL EQUATIONS. PHI, 2009.