APA-viite (7. p.)

Furche, T., Gottlob, G., Grasso, G., Guo, X., Orsi, G., Schallhart, C., & Mille, A. (2012). OPAL: Automated form understanding for the deep web. ACM.

Chicago-viite (17. p.)

Furche, T., G. Gottlob, G. Grasso, X. Guo, G. Orsi, C. Schallhart, ja A. Mille. OPAL: Automated Form Understanding for the Deep Web. ACM, 2012.

MLA-viite (9. p.)

Furche, T., et al. OPAL: Automated Form Understanding for the Deep Web. ACM, 2012.