What punctuation rules apply to references?

• A. Abbreviations in uppercase; punctuation frequent
• B. No abbreviations allowed
• C. Abbreviations freely, punctuation rarely
• D. Punctuation must always accompany abbreviations

Answer: (C)

In references, the aim is to be clear and concise, using standard abbreviations where appropriate so the citation stays compact and recognizable. Abbreviations are common for journal titles, organizations, and other standard terms, and you use them as long as readers will understand them or you provide a definition if needed. Punctuation is used to separate the different parts of the reference (such as author, year, title, source, volume, and pages) but you don’t overdo it around the abbreviations. So abbreviations freely, and punctuation kept to the minimum necessary to separate elements, is the practical approach.