APA-referens (7:e uppl.)

Alviar, V. (2021). Preserving beauty, glory of historical watchtowers. IN Heritage structures [column]. Philippine Daily Inquirer.

Chicago-referens (17:e uppl.)

Alviar, Vaughn. "Preserving Beauty, Glory of Historical Watchtowers. IN Heritage Structures [column]." Philippine Daily Inquirer 2021.

MLA-referens (9:e uppl.)

Alviar, Vaughn. "Preserving Beauty, Glory of Historical Watchtowers. IN Heritage Structures [column]." Philippine Daily Inquirer, 2021.