If you need to cite and reference treaties and other international agreements in aPA documents and articles, here you will find some guidelines from The Bluebook. Fundamental elements of a contract reference 1. Title of the agreement. Start the reference with the full title of the contract. Examples: the use of precise language is expected in scientific writing and the sixth edition offers new opportunities to talk about research participants (note that „topics“ are still an acceptable term, but „participant“ is more representative of the roles of individuals in the research project). The purpose of this guide is to give students a fundamental introduction to the APA citation style (6th edition), including text citation and establishment of reference lists….