William, William and Marpaung, Abdullah Muzi and Rahmawati, Della (2018) Stability of Anthocyanin & Antioxidant Activity of RTD Beverage Made from Clitoria Ternatea L. Petals & Red Spanish Ananas Comosus Fruit. Bachelor thesis, Swiss German University.

William, William and Lingga, Margaretha (2015) The Impact of Corporate Social Responsibility on Profitability and Firm Specific Variables of Companies in Indonesia a Case Study: Real Estate Industry Listed in IDX from 2009-2014. Bachelor thesis, Swiss German University.

William, William and Bustaman, Yosman (2014) The Effect of Market Concentration and Equity Level On Bank Profitability: A Case Study of Indonesian Commercial Banking Industry For The Year 2007-2013. Bachelor thesis, Swiss German University.