APA-ийн эшлэл(7 дахь хэвлэлт)

Eiter, T., Gottlob, G., & Gurevich, Y. (1996). Normal Forms for Second−Order Logic over Finite Structures‚ and Classification of NP Optimization Problems.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Eiter, T., G. Gottlob, ба Y. Gurevich. Normal Forms for Second−Order Logic over Finite Structures‚ and Classification of NP Optimization Problems. 1996.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Eiter, T., et al. Normal Forms for Second−Order Logic over Finite Structures‚ and Classification of NP Optimization Problems. 1996.