Παραπομπή σε μορφή APA (7η εκδ.)

(1989). Monotonically improving approximate answers to relational algebra queries / by Kenneth P. Smith, J.W.S. Liu.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Monotonically Improving Approximate Answers to Relational Algebra Queries / by Kenneth P. Smith, J.W.S. Liu. 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Monotonically Improving Approximate Answers to Relational Algebra Queries / by Kenneth P. Smith, J.W.S. Liu. 1989.