APA (7th ed.) Citation
Sz.-Nagy, B., & Hatvani, L. (1990). Qualitative theory of differential equations. North-Holland.
Chicago Style (17th ed.) Citation
Sz.-Nagy, B., and L. Hatvani. Qualitative Theory of Differential Equations. Amsterdam: North-Holland, 1990.
MLA (9th ed.) Citation
Sz.-Nagy, B., and L. Hatvani. Qualitative Theory of Differential Equations. North-Holland, 1990.
Warning: These citations may not always be 100% accurate.