Tinjauan yuridis mengenai klausula baku sewa beli dan pengakhiran kerjasama secara sepihak dalam kontrak standar (standard form of contract) dalam perjanjian kerjasama operasi (PKO) dikaitkan dengan asas-asas perjanjian: studi kasus PT. Express Kencana = Juridical review regarding standard clause on hire purchase and unilateral termination based on standarized contract (standard form of contract) upon partnership agreement (PKO) in relating with principles of agreement: a case study PT. Express Kencana Lestari