* Slash marks ( / / ): This is the most common method. The phoneme is written within the slash marks, e.g., /t/, /k/, /æ/.
* Brackets ( [ ] ): Brackets are often used to represent phonetic transcriptions, which are more detailed representations of sounds. However, they can also be used for phonemes, especially when distinguishing them from written letters.
* Boldface type: Sometimes, phonemes are written in boldface to distinguish them from written letters, e.g., t, k, æ.
It's important to note that the specific symbol used can vary depending on the context and the author's preference. The meaning should be clear from the surrounding information.
For example, in the context of a discussion of phonetics or phonology, it's likely that slash marks or brackets will be used to represent phonemes. In other contexts, boldface type might be preferred.