Hector S. de Leon

• The law on obligations and contracts
• The fundamentals of taxation
• The law on obligations and contracts
• The law on partnerships and private corporations
• Textbook on the Philippine Constitution
• The law on sales, agency, and credit transactions
• The law on income taxation
• Philippine constitution book
• The law on transfer and business taxation
• Textbook on agrarian reform and taxation (with cooperatives)
• Comprehensive review of business law
• Philippine constitutional law