Lopez, E. H. (2012). Local airline industry sustains its growth as competition heats up. Manila Bulletin.
Chicago-viite (17. p.)Lopez, Edu H. "Local Airline Industry Sustains Its Growth as Competition Heats Up." Manila Bulletin 2012.
MLA-viite (9. p.)Lopez, Edu H. "Local Airline Industry Sustains Its Growth as Competition Heats Up." Manila Bulletin, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.