Gaya APA

sook, K, E. et al (2017). The Content Validity of the English Summative Test for the Eleventh Grade Students at the First Semester of SMA Keluarga Widuri South Jakarta in the 2015/2016 Academic Year . Jakarta: .

Gaya MLA

sook, Kim, Eun. et al. "The Content Validity of the English Summative Test for the Eleventh Grade Students at the First Semester of SMA Keluarga Widuri South Jakarta in the 2015/2016 Academic Year". Jakarta: , 2017. Text.