Gaya APA
Sherbert, R., G., D., R. (2000).
INTRODUCTION TO REAL ANALYSIS THIRD EDITION (Third Edition).
New York:
John Willey & Sons, Inc.
Gaya MLA
Sherbert, Robert, G.Bartle,, Donald, R..
"INTRODUCTION TO REAL ANALYSIS THIRD EDITION".
Third Edition
New York:
John Willey & Sons, Inc,
2000.
Buku Inti.