Gaya APA
Walidin, B. (2017).
Smart Way to Speak English-Grammar for Speaking: sesuai Kurikulum Pesantren Modern (Cet. 2).
Jakarta :
Nira Wisata.
Gaya MLA
Walidin, Bahrul.
"Smart Way to Speak English-Grammar for Speaking: sesuai Kurikulum Pesantren Modern".
Cet. 2
Jakarta :
Nira Wisata,
2017.
Buku.